Rubbing a balloon on hair is an example of static charge build up created by.

The move considered not part of the Second Great Migration is from Pittsburgh to rural Florida. The correct answer is option c.

The Second Great Migration refers to the mass movement of African Americans from the rural South to urban areas in the North and West during 1940-1970. This migration was mainly driven by the pursuit of better economic opportunities and escaping racial segregation.

Options a, b, and d represent moves from the South to the North and West (from Rural Arkansas to Detroit, South Carolina to Seattle, and Beaumont, Texas, to Los Angeles). However, option c (from Pittsburgh to rural Florida) is the opposite direction, moving from an urban area in the North back to the rural South, making it the exception.

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Answer:

1. Avoid bringing metal into contact with batteries.

2. Never allow both terminals to make contact with an item (particularly yourself) simultaneously.                                                                                    3. Do not hand-guide batteries during lifting/moving process.

4. Practice safe and appropriate lifting procedures.

5. Wear protective equipment when handling batteries including gloves, eyewear and hardhat.

Explanation:

Answer: they are compression waves

Explanation:

The unique property of light waves is that they do not require a medium for propagation.

Generally; waves are classified into electromagnetic waves and mechanical waves. Mechanical waves require a medium of propagation while electromagnetic waves do not require a medium for propagation.

Also, waves are classified into transverse waves and longitudinal waves. In transverse waves, the disturbance is perpendicular to the wave front while in longitudinal or compressional waves, the disturbance is parallel to the wave front.

Light is both an electromagnetic wave and a transverse wave. This means that it requires no material medium for propagation. This is the unique property of light waves.

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The picture and the pre-image are consistent ONLY when the scale factor is 1.

A sort of transformation known as a dilatation enlarges or shrinks a figure (referred to as the preimage) to produce a new figure (called the image). How much larger or smaller the dilation image will be in comparison to the preimage depends on the scale factor, r.

The scale factor and the center of dilation are used to determine the dilation transformation. The image stretches if the scaling factor is greater than 1.

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Answer:The disturbance created by a source of sound in the medium travels through the medium and not the particles of the medium

Explanation:i hope this is right

The potential energy of Nan suitcase of mass 14 kg is 54.88 J.

Potential energy is the energy of a body due to its position in the gravitational field.

To calculate the potential energy, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the potential energy is 54.88 J.

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Answer: The law of conservation of linear momentum helps to understand the behavior of a Newton's cradle In a closed system. This law is nothing more than action and reaction.it can be used to predict the resulting direction and speed of motion of objects after they collide.

Explanation: Just as an example, when you play pool/8ball, the white play exerts force on the other balls causing them to break away.

hope this helps.

Answer: The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Explanation:

Answer:

\(\boxed {\boxed {\sf 96 \ m/s}}\)

Explanation:

We are asked to find the final velocity of the car given the acceleration and time. We can use the following kinematics equation to calculate the final velocity.

\(v_f=v_i+(a \times t)\)

The car starts from rest, so the initial velocity is 0 meters per second. It accelerates a rate of 40 meters per square second over a period of time of 2.4 seconds.

Substitute the values into the formula.

\(v_f= 0 \ m/s + ( 40 \ m/s^2 \times2.4 \ s)\)

Solve inside the parentheses.

\(v_f= 0 \ m/s + (96 \ m/s)\)

Add.

\(v_f= 96 \ m/s\)

The final velocity of the car is 96 meters per second.

Answer:

B

Explanation:

The question does not specify any outside forces that could slow down the ball horizontally. There fore the ball does not accelerate or decelerate horizontally. Therefore,  a = 0m/s2

Answer:

They are called beneficial mutations. They lead to new versions of proteins that help organisms adapt to changes in their environment. Beneficial mutations are essential for evolution to occur. They increase an organism's changes of surviving or reproducing, so they are likely to become more common over time.

Explanation:

The amount of air drag on an 0. 8n flying squirrel dropping vertically at terminal velocity is.terminal velocity is 0.8 N .

As a result, a object achieves terminal velocity when its acceleration (or deceleration) are zero and its speed is no longer increasing or decreasing.

around 53 m/s Unaffected by its mass, an item in free fall inside a vacuum would accelerate at a velocity of about 9.8 m/s2 close to the Earth's surface.When an object is dropped, air resistance causes it to finally achieve its terminal velocity, which for a human skydiver is about 53 m/s (190 km/h or 118 mph).

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Conclusion for all parts: The average power delivered by the source is given as 80.0 W. The power factor of the circuit is given as 0.8. The power factor is defined as the ratio of the real power (measured in watts) to the apparent power (measured in volt-amperes). The apparent power is given as P = V / R,

a) The reactance of the inductor can be calculated using the formula X = 2πfL, where f is the frequency of the current, L is the inductance of the inductor, and π is approximately 3.14159. Substituting the given values, we get X = 2π(53)L = 11.7 Hz.

b) The current amplitude in the circuit can be calculated using the formula I = V / R, where V is the voltage across the circuit and R is the resistance of the resistor. Substituting the given values, we get I = 364 V / 2000 Ω = 0.18 A.

c) Here V is the voltage across the circuit and R is the resistance of the resistor. Substituting the given values, we get P = (364 V)^2 / (2000 Ω) = 1.496 W.

The real power is given as P_real = P - X_L - X_C = 1.496 W - 1.17 Hz * 11.7 Hz = 0.316 W. Therefore, the power factor is given as P_real / P = 0.316 / 1.496 = 0.208.

d) The voltage amplitude of the source can be calculated using the formula V = IR, where I is the current amplitude and R is the resistance of the resistor. Substituting the given values, we get V = 0.18 A * 2000 Ω = 360 V.

e) The total power delivered by the source is given as 300 W. Substituting the given values, we get P = 300 W = V_source^2 / (R_L + R_C) = 360 V^2 / (2000 Ω + 11.7 Hz * 500 Ω) = 1.716 W. Therefore, the power factor is given as P / P_real = 1.716 / 0.208 = 8.08.  

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Because r is given, we can use the second expression in the equation ac=v2r;ac=rω2 a c = v 2 r ; a c = r ω 2 to calculate the centripetal acceleration. Solution.

Answer: C

Explanation:

(Magma composition and cooling rate)

Igneous rocks are formed by cooling magma. The location of the formation of the rock, as well as how fast the magma cools will determine the type of igneous rock. Intrusive rocks form from the cooling of magma deep beneath the earth's surface. Since this occurs below the earth's surface, the magma will cool very slowly.

Answer:

c. Magma composition and cooling rate

Explanation:

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust.

Answer:

2 1/4

Explanation:

Answer:

\({ \rm{ = \frac{1}{2} ( - 1 \frac{3}{4} - ( - 2 \frac{1}{2})) }} \\ \\ = { \rm{ \frac{1}{2} ( \frac{3}{4}) }} \\ \\ = { \rm{ \frac{3}{8} }}\)

The gravitational binding energy depend(s) on the assumption that the mass of a galaxy or galactic cluster is large enough to keep moving matter bound to the main structure.

Gravitational binding energy is the amount of energy required to completely separate an object into its constituent parts, taking into account the gravitational forces between those parts. This energy is a result of the attractive force of gravity between the individual particles or components that make up an object.

The greater the mass of the object and the closer together its constituent particles, the stronger the gravitational binding energy. For example, the gravitational binding energy of a planet is very high due to the large amount of mass involved and the small distances between its constituent particles. Gravitational binding energy plays a significant role in astrophysics, as it determines the stability of celestial bodies such as stars, planets, and galaxies. It is also important in nuclear physics, where it is used to calculate the energy released during nuclear fusion or fission reactions.

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Explanation:

The ratio of the areas is the square of the ratio of the radii.

A/A = 3.16² = 9.99

The ratio of the volumes is the cube of the ratio of the radii.

V/V = 3.16³ = 31.6

Answer:

5,600

Explanation:

You split x10^15 into x10^12 and x10^3. Our new equation is 5.6x10^3x10^12

We do 5.6x10^3 and we get 5,600. Our new equation is 5,600x10^12. I hope this answered your question.

solid...............

Where Vp is the primary voltage, Vs is the secondary voltage, Np is the number of loops in the primary coil, and Ns is the number of loops in the secondary coil.

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Answer:

like a stran of yarn

Explanation:

because if shhsjsjsjwjwjwkqkq

The number of sets of measures that a within-subjects F-test will accommodate depends on the specific design and factors involved in the study.

The within-subjects F-test, also known as repeated measures ANOVA (Analysis of Variance), is used to analyze the effects of one or more independent variables on a dependent variable measured on the same subjects over multiple conditions or time points. In a within-subjects design, each participant or subject undergoes all levels or conditions of the independent variable(s). The number of sets of measures is determined by the number of levels or conditions of the independent variable(s) being studied. For example, if there are two independent variables, each with three levels, and all participants are measured in each combination of levels, then there would be six sets of measures (2 * 3 = 6). Each set would consist of measurements taken on the same subjects under a specific combination of conditions.

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Answer:

C

Explanation:

I got it right on the test !!

The student that is correct is C. Student B is correct because Newton’s 1st Law of Motion states that if the chair were to be exerting a force on the student, her motion would change.

According to Newton's third law of motion, there's an equal and opposite reaction force for every action force. It should be noted that when an individual sits on a chair, the chair is actually exerting a force back on her in reaction to the force exerted upon the chair.

Student A is incorrect because when she sits down on a chair, the force that she's exerting on the chair is not the only thing that happens because the chair exerts a force back. Therefore, as the chair were to be exerting a force on the student, her motion would change.

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Explanation:

Which of the following statements describe an object in equilibrium?

III. The net external force on the object is zero

I hope this helps

Answer:

F = 70000  N

Explanation:

Given that,

Mass of a car, m = 1400 kg

Initial speed of the car, u = 15 m/s

Finally, it hits the ground, v = 0

Time, t= 0.3 s

We need to find the force experienced by the car. Using Newton's second law of motion to find it.

F = ma

a is acceleration of the car.

\(F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{1400\times (0-15)}{0.3}\\\\=-70000\ N\)

So, the force experienced by the car has a magnitude of 70000  N.

In conclusion, when an air-track glider is attached to a spring and pulled to the right before being released from rest, it undergoes simple harmonic motion.

The air-track glider is attached to a spring and is pulled to the right before being released from rest. When the glider is released, it will experience simple harmonic motion due to the spring's restoring force.

During simple harmonic motion, the glider will oscillate back and forth along the air track. The motion is characterized by a period (T) and a frequency (f), which depend on the mass of the glider (m) and the spring constant (k).

The period of the motion, T, is the time it takes for the glider to complete one full oscillation. It can be calculated using the formula T = 2π√(m/k). The frequency, f, is the number of oscillations per second and is the reciprocal of the period (f = 1/T).

As the glider is released from rest, it will initially move to the right due to the pull. As it moves, the spring will stretch and create a restoring force that pulls the glider back towards the equilibrium position.

The glider will then pass the equilibrium position, compressing the spring and causing a restoring force that opposes the glider's motion.

This back and forth motion continues until the energy of the glider is dissipated due to friction or other factors. The glider will gradually come to a stop at the equilibrium position.

In conclusion, when an air-track glider is attached to a spring and pulled to the right before being released from rest, it undergoes simple harmonic motion.

This motion is characterized by oscillations back and forth along the air track, with a period and frequency determined by the mass of the glider and the spring constant.

The glider experiences a restoring force from the spring that opposes its motion, causing it to oscillate until energy is dissipated and it comes to a stop at the equilibrium position.

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The angle of incidence from the glass when the reflected light in the glass is linearly polarized is called Brewster's angle.

Brewster's angle is the angle of incidence at which light is polarized when it is reflected from a transparent surface, such as glass. The reflected light at this angle is entirely polarized and has no parallel component.What is polarization of light?When light waves propagate through space, the electric and magnetic fields at each point in the wave can oscillate in different directions.

                        The polarization of light is the orientation of the electric field vector that produces the electromagnetic wave as it propagates. The reflected light from a transparent surface, such as glass, is entirely polarized when the angle of incidence is Brewster's angle. When the angle of incidence is greater than Brewster's angle, both polarizations are reflected, and the reflected light is no longer linearly polarized.

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